Sheet-glass-surfacing apparatus



April 21, 1931. J. E. LANDOLT SHEET GLASS SURFACING APPARATUS Filed June25, 1927 gwpentov Johh E. Lafido/Z l at'enied Apr. 21, 1931 UNITEDSTATES PATENT OFFICE JOHN E. LANDOLT, OF TOLEDO, OHIO, ASSIGNOB TOLIBBEY-OWENS-FORD GLASS COM- PANY, F TOLEDO, OHIO, A CORPORATION OF OHIOSHEET-GLASS-SUBFACING APPARATUS Application filed June 25,

o'means for supporting a sheet or sheets of glass and rotating the sameduring the polishing operation, polishing members adapted to 'contactwith said sheet, and means for discharging a fluid upon the sheet, andfor instantaneouslycutting off said discharge when desired.

Another object is to provide in sheet glass surfacing apparatus andparticularly a polishing machine, a plurality of conduits auassociatedwith a single header, which in turn is connected to a suitable source ofliquid supply, said conduits being inclined downwardly toward the headerso that when the fluid is turned ofi the pipes will dram back throughsaid header.

Other objects and advantages of the invention will become more apparentduring the course of the following description when taken in connectionwith the accompanying ea drawings.

In the drawings wherein like numerals are employed to designate likeparts throughout the same,

Fig. 1 is an elevation of a form of surfacing machine illustrating myinvention in use,

and r Fig. 2 is a plan view thereof, illustrating diagrammatically thearrangement of conduit-s used.

1 Although the invention is not necessarily restricted for use inconnection with any particular type of glass surfacing machine, it hasbeen designed primarily for that type of machine where the sheet orsheets of glass are 45 "supported upon a rotating table in a mannerthatsurfacing elements may rest upon said sheet of glass and caused torotate by reason of frictional contact therewith.

In the drawings, the numeral 5 designates a polishing machine in itsentirety which com- 1927. Serial No. 201,343.

prises a frame 6, a rotatable table 7 adapted to support the sheet ofglass 8 to be surfaced, and a plurality of surfacing units 9. In thedrawings the surfacing elements are in the form of polishing memberswhich may be belt covered blocks 10.

In the production of plate glass, the glass blank is usually firstground by means of suitable abrasive orabrasives, after which it issubjected to a polishing action. The polishing is usually accomplishedby means of a rouge mixture and hot water. In using the machineillustrated, a rouge mixture is usually applied fairly heavy at thebeginning of the operation, after which the supply of rouge is taperedoff and hot water is supplied.

To insure that the supply of hot water be I cut off instantly when it isdesired to no longer furnish the same, I have provided a constructionwherein the excess water remaining in the conduits is discharged awayfrom the sheet.

In the drawings the numeral 11 designates a polishing medium supplypipe. As above stated, the polishing medium is usually rouge mixed withwater. Connected to the conduit 11 and associated with the machine is apipe 12. The pipe 12 is adapted to discharge the polishing mediumthrough the end 13 upon the sheet, while a valve 14 controlled by meansof the handle 15 is used to control the amount of rouge fed.

A pipe 16 is provided and has preferably hot water or similar fluidcirculating therethrough. A header 17 is mounted on the machine and hasa plurality of pipes 18 extending therefrom. The header is connected bymeans of the pipe 19 to the conduit 16, a valve 20 being arranged insaid line 19 to control the flow to the header. A valve 21 is alsoarranged in each one of the lines 18.

A discharge pipe 22 and valve 23 is connected to the header 17 as shown.The header 17 is slanted downwardly toward the discharge pipe 22, whilethe pipes 18 are in turn inclined toward the header, except of coursefor the discharge ends 2 1. A supplementary pipe 25 is also connectedto, the header and to the rouge line 11,.the pipe 25 being controlledbyimeans of the valve 26.

'add a little hot Water, and to do this the alve 25 i clo ed and the ve201is ope ed t0 thedesired t, contr lling the n dividual valves 21, thedischarge of hot water can be accurately controlled, When it is de=siredto stop using the water, the valve 20 is closed and the valve 23 isopened. Ina.- mediately, due to the inclination of the header and theassociated pipes, the excess Water will flow through the discharge pipe22 into a-gutter which is positioned beneath the table, but which is notillustrated for thepurpose "of-clearness." r

In some instances, it may be desirable to discharge polishing mediumthrough the pipes 24., in which case the valve 26 may be opened whichwill permit the rouge to flow from the pipe. 11 through the pipes 24;.

It is to be understood that the form of the invention herewith shown anddescribed is tobe taken as the preferred embodiment of the same, andthat various changes. in the shape, size and arrangement of parts may.be resorted to without departing from'the spirit of the invention or thescope of the subjoined claims. a Y

Claims:

1 In sheet glass surfacing apparatus,

means for supplying polishing medium to the sheet of glass to besurfaced, said means comprising a main conduit containing a polishingmedium, an inclined header,ineans connecting the main conduit andheader, a valve in said connecting means for controlling'the supply ofpolishing-medium to the sheet of glass to'be surfaced, a plurality ofpipes connected to the header and inclining l upwardly away therefrom,and a valve con trolled drain'pipe connected to the lower end 7 of saidheader adapted to drain the plurality of'pipes and the inclined headerwhen the valve in said'.main conduit, and header connesting means isclosed. i

2. In apparatus for supplying a polishing medium to a glass sheet to besurfaced,, a plurality of fixed conduits terminating in, dis- 7 chargespouts positioned vabove the glass sheet, means for supplying apolishing medium to the conduits whereby it is discharged from saidspouts onto said sheet, said conduits inclining downwardly away from thedischarge spouts, and a common drain pipe connected with the lower endsof said conduits remote from said spouts for draining the conduits whenthe supply of polishing medium thereto is shut off;- I i '3. Inapparatus forsupplying a polishing -medlum to a glass sheet to besurfaced, an in clined header, a plurality of pipes connected theretoand inclining upwardly away therefrom, said pipes terminating indischarge nozzles positioned above the sheet, means for supplying apolishing medium to the header and pipes whereby thesame is dischargedfrom said nozzles onto said sheet, vand a drain pipe connected to thelower end of said header for draining said header and pipes when thesupply of polishing medium there to is shut off;

I 4}. In appara-tus for supplying a polishing medium to a glass sheet tobe surfaced, a main conduit adapted to contain the polishing medium, aninclinedheader, a connection between the main conduit and header; avalve in said connection for controlling the supply of polishing'rmediumto said header,

a second main conduit adapted to contain water, a connection between thesecond conduit and headen a valve in said last named connection forcontrollingthe supply of Water to said header, aplurality of pipes con.-nected to said header and inclining upward ly away therefrom, saidpipes'termi-nating in discharge nozzles positioned-above the glass sheetto be surfaced for discharging the polishing medium and waterthereupon,"and a valve controlled drain pipe connected to-the lower endof said header for draining the header and pipes when the valves in theconnections between the header and mainconduits are closed, I

j Signed at Toledo,- in the county of Lucas and State of Ohio, this:231'd day of June,

LANDOLT.

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